U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Datums Page Page 1 of 7
Station ID: 8651370 PUBLICATION DATE: 04/21/2003
Name: DUCK, FRF PIER
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 36° 11.0' N
USGS Quad: KITTY HAWK Longitude: 75° 44.8' W
To reach the tidal bench marks from the Methodist Church in Duck, proceed north
on State Road 1152 for 1.6 km (1.0 mi) to the U.S. Corps of Engineers Research
Facility. The bench marks are located on the pier, in the parking lot, and
along the pier access road. The tide gage and electric tape gage are located on
the offshore end of the pier.
T I D A L B E N C H M A R K S
PRIMARY BENCH MARK STAMPING: 1370 B 1977
DESIGNATION: 865 1370 B TIDAL
MONUMENTATION: Tidal Station disk VM#: 522
AGENCY: National Ocean Survey (NOS) PID#: FW0688
SETTING CLASSIFICATION: Galvanized steel rod
The primary bench mark is a disk located on the north side of the concrete ramp
for access to the concrete platform around the Research Center Office Building
and the pier, 31.09 m (102.0 ft) north of the center of the paved access road,
13.41 m (44.0 ft) NE of the west end of the NW corner of the concrete ramp, 3.35
m (11.0 ft) NW of the NW corner of a 1 m x 1 m (3 ft x 3 ft) concrete tower
foundation (abandoned), and 0.30 m (0.98 ft) south of a witness post. The bench
mark is 15 cm (0.5 ft) above ground level, crimped to a galvanized steel rod
driven 7.3 m (24 ft) to refusal, and encased in a 6-inch PVC pipe and concrete
kickblock.
BENCH MARK STAMPING: 1370 A 1977
DESIGNATION: 865 1370 A TIDAL
MONUMENTATION: Tidal Station disk VM#: 523
AGENCY: National Ocean Survey (NOS) PID#: FW0691
SETTING CLASSIFICATION: Concrete pier abutment
The bench mark is a disk set vertically and centered in the south face of the
first concrete abutment of the pier and mostly covered by 3 PVC pipes coming
down from the pier, 3.66 m (12.0 ft) NW of the NW corner of a 2 m (6 ft) high
chain link fence, and 0.91 m (3.0 ft) above the ground.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 2 of 7
Station ID: 8651370 PUBLICATION DATE: 04/21/2003
Name: DUCK, FRF PIER
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 36° 11.0' N
USGS Quad: KITTY HAWK Longitude: 75° 44.8' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1370 C 1977
DESIGNATION: 865 1370 C TIDAL
MONUMENTATION: Tidal Station disk VM#: 524
AGENCY: National Ocean Survey (NOS) PID#: FW0686
SETTING CLASSIFICATION: Copper-clad steel rod
The bench mark is a disk located approximately half-way between the entrance
gate on Highway 1152 and the gate to the facility, 91.41 m (299.9 ft) west of
an information gazebo, 30.66 m (101.0 ft) NNW of the center of the paved road,
25 m (82 ft) north of the north edge of the paved access road, and 0.49 m (1.6
ft) SSE of a wooden witness post with sign. The bench mark is 23 cm (0.8 ft)
above ground level, crimped to a galvanized steel rod driven 9.8 m (32 ft) to
refusal, and encased in a 6-inch PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 1370 D 1977
DESIGNATION: 865 1370 D TIDAL
MONUMENTATION: Tidal Station disk VM#: 525
AGENCY: National Ocean Survey (NOS) PID#: FW0685
SETTING CLASSIFICATION: Galvanized steel rod
The bench mark is a disk located in the NE quadrant of the intersection of
County Road 1152 and the entrance road to the pier, 30.48 m (100.0 ft) east of
the center line of County Road 1152, 30.48 m (100.0 ft) north of the center of
the access road, 23.77 m (78.0 ft) NE of the east leg of a wooden sign for the
Research Center, and 0.60 m (2.0 ft) south of a wooden witness post with sign.
The bench mark is 18 cm (0.6 ft) above ground level, crimped to a galvanized
steel rod driven 7.3 m (24 ft) to refusal, and encased in a 6-inch PVC pipe and
concrete kickblock.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 3 of 7
Station ID: 8651370 PUBLICATION DATE: 04/21/2003
Name: DUCK, FRF PIER
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 36° 11.0' N
USGS Quad: KITTY HAWK Longitude: 75° 44.8' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1370 F 1979
DESIGNATION: 865 1370 F TIDAL
MONUMENTATION: Tidal Station disk VM#: 527
AGENCY: National Ocean Survey (NOS) PID#: FW0684
SETTING CLASSIFICATION: Galvanized steel rod
The bench mark is a disk located on the NW side of the first power pole west of
the junction of County Road 1152 and the paveed access road to the pier, 53.34 m
(175.0 ft) west of the center line of County Road 1152, 16 m (51 ft) east of the
east bank of Currituck Sound, 2.99 m (9.8 ft) NW of power pole with a guy wire
No. Q1732, 0.98 m (3.2 ft) SW of the base of the guy wire of the power pole, and
in a small clearing. The bench mark is 10 cm (0.4 ft) above ground level,
crimped to a galvanized steel rod driven 7.0 m (23 ft) to refusal, and encased
in a 6-inch PVC pipe and concrete kickblock.
BENCH MARK STAMPING: 1370 G 1980
DESIGNATION: 865 1370 G TIDAL
MONUMENTATION: Tidal Station disk VM#: 528
AGENCY: National Ocean Survey (NOS) PID#: FW0692
SETTING CLASSIFICATION: Concrete pier platform
The bench mark is a disk set in the SE corner of the concrete platform of the
pier which also supports the office building of the Research Center, 17.10 m
(56.1 ft) south of the center of the pier, 7.92 m (26.0 ft) SE of the SE corner
of the office building, and 0.79 m (2.6 ft) NW of the SE corner post of the
metal pipe railing around the platform.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 4 of 7
Station ID: 8651370 PUBLICATION DATE: 04/21/2003
Name: DUCK, FRF PIER
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 36° 11.0' N
USGS Quad: KITTY HAWK Longitude: 75° 44.8' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1370 H 1980
DESIGNATION: 865 1370 H TIDAL
MONUMENTATION: Tidal Station disk VM#: 529
AGENCY: National Ocean Survey (NOS) PID#: FW0689
SETTING CLASSIFICATION: Concrete pier platform
The bench mark is a disk set in the NE corner of the concrete platform of the
pier which also supports the office building of the Research Center, 22.50 m
(73.8 ft) north of the center of the pier, 10.81 m (35.5 ft) NE of the NE corner
of the office building, and 0.82 m (2.7 ft) SW of the NE corner post of a metal
pipe railing around the platform.
BENCH MARK STAMPING: 1370 J 1980
DESIGNATION: 865 1370 J TIDAL
MONUMENTATION: Tidal Station disk VM#: 530
AGENCY: National Ocean Survey (NOS) PID#: FW0687
SETTING CLASSIFICATION: Retaining wall
The bench mark is a disk set in the SE corner of the concrete retaining wall of
an asphalt ramp abutting the concrete ramp of the Research Center for access to
the platform around the Research Center and the pier, 17.72 m (58.1 ft) north of
the center of the paved access road of the Research Center, and 2.74 m (9.0 ft)
east of the west end of the south retaining wall of the asphalt ramp.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 5 of 7
Station ID: 8651370 PUBLICATION DATE: 04/21/2003
Name: DUCK, FRF PIER
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 36° 11.0' N
USGS Quad: KITTY HAWK Longitude: 75° 44.8' W
T I D A L B E N C H M A R K S
BENCH MARK STAMPING: 1370 K 1980
DESIGNATION: 865 1370 K TIDAL
MONUMENTATION: Tidal Station disk VM#: 531
AGENCY: National Ocean Survey (NOS) PID#: FW0690
SETTING CLASSIFICATION: Concrete pier deck
The bench mark is a disk set on the south side of the Research Center pier, 5.97
m (19.6 ft) east of NO 1380 painted horizontally at 12.19 m (40 ft) intervals
along the pier, and 0.68 m (2.23 ft) SW of the SW rail of a road track along the
pier.
BENCH MARK STAMPING: C 255 1981
DESIGNATION: C 255
MONUMENTATION: Flange-encased Rod VM#: 13777
AGENCY: National Geodetic Survey (NGS) PID#: FW0693
SETTING CLASSIFICATION: Stainless steel rod
The bench mark is a flange-encased rod located on the west side of the large
metal flag pole for the Research Center building, 4.57 m (15.0 ft) SW of the SW
corner of the bottom concrete entrance step of the north entrance steps of the
building, 4.48 m (14.7 ft) NW of the NW corner of the bottom concrete entrance
step of the south entrance steps of the building, and 0.82 m (2.7 ft) west of
the flag pole. The datum point is the top of a stainless steel rod driven 9.7 m
(32 ft) to refusal, encased in an NGS logo cap.
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 6 of 7
Station ID: 8651370 PUBLICATION DATE: 04/21/2003
Name: DUCK, FRF PIER
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 36° 11.0' N
USGS Quad: KITTY HAWK Longitude: 75° 44.8' W
T I D A L D A T U M S
Tidal datums at DUCK, FRF PIER based on:
LENGTH OF SERIES: 19 Years
TIME PERIOD: January 1983 - December 2001
TIDAL EPOCH: 1983-2001
CONTROL TIDE STATION:
Elevations of tidal datums referred to Mean Lower Low Water (MLLW), in METERS:
HIGHEST OBSERVED WATER LEVEL (08/30/1999) = 2.110
MEAN HIGHER HIGH WATER (MHHW) = 1.124
MEAN HIGH WATER (MHW) = 1.026
NORTH AMERICAN VERTICAL DATUM-1988 (NAVD) = 0.667
MEAN SEA LEVEL (MSL) = 0.539
MEAN TIDE LEVEL (MTL) = 0.535
MEAN LOW WATER (MLW) = 0.044
MEAN LOWER LOW WATER (MLLW) = 0.000
LOWEST OBSERVED WATER LEVEL (03/16/1980) = -0.811
National Geodetic Vertical Datum (NGVD 29)
Bench Mark Elevation Information In METERS above:
Stamping or Designation MLLW MHW
1370 B 1977 4.398 3.371
1370 A 1977 6.730 5.704
1370 C 1977 6.296 5.269
1370 D 1977 2.935 1.908
1370 F 1979 2.174 1.147
1370 G 1980 8.053 7.027
1370 H 1980 8.039 7.013
1370 J 1980 5.899 4.873
1370 K 1980 8.122 7.095
C 255 1981 5.815 4.789
U.S. DEPARTMENT OF COMMERCE
National Oceanic and Atmospheric Administration
National Ocean Service
Page 7 of 7
Station ID: 8651370 PUBLICATION DATE: 04/21/2003
Name: DUCK, FRF PIER
NORTH CAROLINA
NOAA Chart: 12204 Latitude: 36° 11.0' N
USGS Quad: KITTY HAWK Longitude: 75° 44.8' W
D E F I N I T I O N S
Mean Sea Level (MSL) is a tidal datum determined over a 19-year National Tidal
Datum Epoch. It pertains to local mean sea level and should not be confused
with the fixed datums of North American Vertical Datum of 1988 (NAVD 88).
NGVD 29 is a fixed datum adopted as a national standard geodetic reference for
heights but is now considered superseded. NGVD 29 is sometimes referred to as
Sea Level Datum of 1929 or as Mean Sea Level on some early issues of Geological
Survey Topographic Quads. NGVD 29 was originally derived from a general
adjustment of the first-order leveling networks of the U.S. and Canada after
holding mean sea level observed at 26 long term tide stations as fixed.
Numerous local and wide-spread adjustments have been made since establishment in
1929. Bench mark elevations relative to NGVD 29 are available from the National
Geodetic Survey (NGS) data base via the World Wide Web at
National Geodetic Survey.
NAVD 88 is a fixed datum derived from a simultaneous, least squares, minimum
constraint adjustment of Canadian/Mexican/United States leveling observations.
Local mean sea level observed at Father Point/Rimouski, Canada was held fixed as
the single initial constraint. NAVD 88 replaces NGVD 29 as the national
standard geodetic reference for heights. Bench mark elevations relative to
NAVD 88 are available from NGS through the World Wide Web at
National Geodetic Survey.
NGVD 29 and NAVD 88 are fixed geodetic datums whose elevation relationships to
local MSL and other tidal datums may not be consistent from one location to
another.
The Vertical Mark Number (VM#) and PID# shown on the bench mark sheet are unique
identifiers for bench marks in the tidal and geodetic databases, respectively.
Each bench mark in either database has a single, unique VM# and/or PID# assigned.
Where both VM# and PID# are indicated, both tidal and geodetic elevations are
available for the bench mark listed.
The NAVD 88 elevation is shown on the Elevations of Tidal Datums Table Referred
to MLLW only when two or more of the bench marks listed have NAVD 88 elevations.
The NAVD 88 elevation relationship shown in the table is derived from an average
of several bench mark elevations relative to tide station datum. As a result of
this averaging, NAVD 88 bench mark elevations computed indirectly from the tidal
datums elevation table may differ slightly from NAVD 88 elevations listed for
each bench mark in the NGS database.